Well, I know of 3 completely free 3D applications:
1. (url="http://"http://www.povray.org")POV-Ray(/url), a bit hard to learn but a fairly good rendering engine.
2. (url="http://"http://www.wings3d.com")Wings 3D(/url), fairly easy to learn, but no real rendering engine to speak of.
3. (url="http://"http://www.blender.org")Blender(/url), very difficult to learn, but apparently very powerful once you know it. There are some tutorials for this if you look around their site too.
I've seen good stuff come out of all three, but with Wings, the renders are usually done in another program. It's more of a mesh editor. Hope that all helps!
MickyBIs
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Who is John Galt?
"I've never heard maniacal laughter from a robot before. It's good to have brought something new and wonderful into the world"-(url="http://"http://freefall.purrsia.com/")Freefall(/url)